Condenser structure



April 23, 1929. c. E. WARNER ET AL CONDENS ER STRUCTURE Filed Oct. 1927 2 Sheets-Sheet Inventors.- C'riaZz 'ZZ'd/MZW' 35 MM 71.

April 23, 1929. c. E. WARNER ET AL 1,709,964

CONDENSER STRUCTURE FiIed Oct. 1927 2 Sheets-Sheet" 2 ,Jizve n'fo rs;

(Zedfn Wm? 13 $454114 /7. fizim X02264, W W

Patented Apr. 23, 1929.

CHESTER 13. WARNER/AND ARTHUR Ni TENT OFFICE.

NILSON. OF CHICAGO, ILLINOIS, ASSIGNORS "'TO'BENJALIIIT ELECTRIC MANUFACTURING COI IPAIJY. OF CHICAGO. ILLINOIS, A

CORPORATION OF ILLINOIS.

CONDENSER STRUCTURE.

Application filed October 8, 1927.

. Que invention relates to a condenser structure j 2 1911s: ,O f' the objects-oflour invention is to providelan improved, condenser structure in whie Lf rairgeof movement ofthe movable condenser elepient for a; l iv en movement of the l llzll l tlally operable memberniay be varied. fnr ther object o f our invention is to provide an improved condenser structure in which aselect-ive variable speed transmission pr vide dl for varying the capacity curve of the e dn r;

A further objectof our invention is to provide fa gang. condenser structure having a simple; adjustment; whereby the capacity euro ft e.variablecondensers may be adjuste'cllp fterftlre radio receiving set is completelyfconiieetedup, so as to give the (leslred charaetristles to the various circuits at all settings of the eominon ianual eon- [IO 01'." l ,j l

Fiirtherobjects,will.appear from the 'desci iption,an d claims.

Generic claims ;on thereonstruet-ion disclosed "th s applicationareiprtisented in ounce-pen rng applieation Serial No. 212,- ,;fi1 d 4t guu' '5,192 In the dawing s; in which van embodiment of on tipnlls sh,bw l,.

1 Fiiu e- 1 I a f ro n t view of a panel of aradio 1 i set wlth'which our improved end en tru cttire maybe used;

front v iewof the metal support- 7 iug 'p'lateor ehzis'siswith the parts supported h e y; r

3is a rear'viewof the'chassis and parts supportedthereby; i

EiglA is a section on theline 44 of Fig. lgiu' d' f a jliig. 5 is a section on the line 55 of Fig. 4. Referring to thejdrawings in detail, the

construction sho'wncomprises a plurality of similar condenser units 1, two being shown,

va nietal plate,orchassisl2 on which these conden'ser un ts are mounted, an insulating panel 3 in fi'font-ofthe metal plate a manually 0perableknob 4 for simultaneously actuating both of tl rc con denser units, an indicating dial (nan'd transmission from the knobs to the individual condensers.

This transmission includes a shaft 6 on which the knob 4 is secured, a pinion 7 secured to this shaft', a universal bar 8 having a rack Serial No. 224,824.

These selective variable speed transmissions I for the. condenser units are similar and each comprises a two-armed rock member 10 pivotally mounted at 11 on a bracket 12 secured to the universal bar 8 a follower 13 pivot-ally secured to one arm of this rock mom her, an adjustable guide or track 14 in which this follower slides, a pair of pulleys 15 rotatably mounted on theuniversal bar, and a flexible belt or cable 16 having ends secured to the two ends of the t-u-o-armed rock 1nemz-er 10. respectively. and passing over the two pulleys 15, and secured to a rotatable pulley meml-er 17 secured to the oscillatable shaft 18 on which the oscillatable condenser plates 19 mounted.

The condensers 1 knob at, and the entire transmission between the knobs and condcus crs, may be mounted on the metal supporting plate or chassis The shaft 6 on which the manually o lwrable'knob and the pinion are mounted,-inay itself be rotatably mounted in 'u hers 21.-

The indicating dial 5 may be mounted on a sleeve member which in turn is rotatably mounted on the b '-arin; sleeve 20. The sleeve on which the dial is mounted may have a pulley portion 23 formed integral therewith, this pulley having'seeured thereto a flexiblebelt or cable member 2% which passes thcrearound, and the ends of which are secured to brackets 25 'mounted on the universal bar 8. With this construction when a knob is rotated the pinion will cause the universal bar to be shifted longitudinally and the dial to be rotated by means of the cable and pulley transmission.

A suitable stationary index may be provided for cooperating with the dial, a portion of. the d al and this stationary index being visible through a suitable window 26 provided in the. front panel. I

In order to take up slack on the transmission cable one end may be provided with a suitable adjustment comprising a screw 27 to which the end of the cable is secured, which screw extends through a laterally extending bearing bracket or sleeve 20 secured to the r'earof the chassis by means of rivet memfor the two. "condensers either one ma lug 28 on the two-armed rock member 10 and is provided with an adjusting thumb nut 29 which bears on the upper face of the lug 28, so that by turning this thumb nut the cable ma 1 be tightened or slackened.

ach-end of the track or guide 14 in which the follower 13 slides is adjust-able independently of the other end by means of screws 30, each having threaded engagement with a flange 31 on the chassis plate 2. The points of these screws bear on the upper side of the adjustable track 14, a leaf spring 32 is provided for ho'lding the track up against the pointof tlmjscrews. The screws, the adjustmentbfwliich determines the position of .the track fare so positioned that'when the cotrespoiiding condenser 'is in one of its extreme'p6sit'ions a slide will be directly underjone of thescrews, and so that. when athe condenseris in its other extreme position :the slide will beflir'ec'tlynnder tlieot-her screw. By "reasonlofthisj positioning of the screws one ofjthe extrem'e positions of, the condenser may be varied 'ivithont varying .the other .extreme'position 0 f the condenser to any .211)- preciable extent. 'From this construction it results that: one end of the capacity curve of the condenser may 'be varied without appreciably'afiecting the other end of the capacity curve, and vice'versa.

The track is guided in its adjusting movement by means ofapair. of screws .33 extend ing thi'ough'yentical slots 34 in the chassis plate 2 and'threadedinto the guide 1&1. When the 'tracl; lia" s been "adjusted to the desired position it may beifirmly' held there by tackingfup these; guide screws33.

By means jot 't'l is indep' .nden't adjustment h be made to have its initial position anyt ling desired within the limits of the adjusting means, and also'to have its final position anytliingdc sircd within the limits of theadj usting means, anr'lbecause of the fact, as previously pointed out, that in the initial positionof the, condenser the slide is directly under one adjusting screw and in the final position the slide is directly under the other adjusting-screw. The initial position of the condenser may be changed without changing the final position of the condenser and vice versa.

By means ofithis construction a receiving setmay be ass'embled without taking pains in matching condensers and coils, and after the set is .a'll complete the condensers may be adjusted so as to give the desired characteristics to the various circuits at all settings of the common manual controller.

Vhile we have described but one embodiment of our invention, it is obvious that many modifications therein may occur to those skilled in the art, and we desire, therefore, that our invention be limited only by the scope of the appended claims and by the prior art.

\Ye claim:

1. A condenser construction comprising a. movable colidenserelemcnt, a manually-operable member foract-uating the movable-condenser element, and means :for war-ying the capacity curve for the condenser comprising a selective variable speed transmission between the manually operable member and the movable condenser element, said variable speed transmission comprising a member morable'back and orth andactuated by said manually operable member, an arm pivotally mounted on said movable member, an adjustable guide for controlling ihe movementof saidarm, and transmission between said arm and .the'movable condenser element, said last transmission comprising a belt member and a rotatable member actuated by said belt member.

,2. A condenser construction comprising a movable condenser element, a manually operable member for actuating the movable .condenser element, and means for varying the capacity curve for the condenser comprising a selective variable speed transmission between the manually operable member and the movable condenser clement, said variable speed transmission. comprising a member movab'le back and forth and actuated by .said manually "operable member, a two-armed rock member .pivotally mounted on said mo.v able member, an adjustable guide for controlling the movement of said rock member, and transmission from said two-armed member to said .movable condenser element comprising belt means secured .to the two .arms of said rock incn'iber rcspectiyelygnnd 'a rotatablc'member actuated by said belt means.

A gang condenser" construction comprising a plurality of condensers, each having a movable condenser element, a common manually operable member for actuating all of said movable condenser elements and means for varying the capacity curve of one ofsaid condensers comprising a selective variable Speed transmission between .said manually operable member and a movable element of said condenser, said variable speed trans mission comprising a.-member movable back and forth and actuated by said operable member, an arm pivotally mounted on said movable member, an adjustable guide for controlling the movement of said arm, and transmission between said arm and the movable condenser clement, said last transmission comprising a belt member and a rotatable member actuated by said'helt member.

In witness where-of, we have hereunto sulr scribed our names.

CHESTER E. WARNER. ARTHUR- N. NILSON. 

